M. Cha, W. Han, G. Lee, M. Kim, and K. Sohn. TREC, volume 500-319 of NIST Special Publication, National Institute of Standards and Technology (NIST), (2015)
S. Wu, K. Wagholikar, S. Sohn, V. Kaggal, and H. Liu. TREC, volume 500-296 of NIST Special Publication, National Institute of Standards and Technology (NIST), (2011)